S-90161A557 Length 3 3/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with blue-coated steel for extended service life in demanding environments.
• Exceptional holding power with 190 lbs pull-out and 225 lbs shear strength for reliable anchoring in concrete up to 3,000 psi.
• Easy installation and removal with external hex/slotted drive for versatile tool use and non-permanent fastening.
• Optimized thread design with 1-5/8" thread length and pointed tip for faster, more secure penetration into masonry materials.
• Stable flange design with 0.414" diameter for enhanced load distribution and reduced surface damage.
• Precision compatibility requiring only a standard 3/16" drill bit, simplifying the installation process.
• Versatile application in concrete, block, and brick with a minimum 1" embedment depth for robust structural connections.

Professional Applications & Engineering Value

Engineered for heavy-duty masonry applications, these blue corrosion-resistant steel tapping screws address critical challenges in construction and industrial maintenance. The external hex/slotted drive allows for high-torque installation with common tools, ensuring rapid deployment in time-sensitive projects. The right-hand threaded design with a pointed tip facilitates quick, self-tapping action into pre-drilled holes, minimizing labor and tool wear. With a 1-5/8" thread length and robust flange, these screws provide superior resistance to vibration and dynamic loads in concrete, brick, and block substrates, making them ideal for securing HVAC systems, structural frames, and machinery bases where removable anchors are required without compromising on 190 lbs pull-out strength.

Specification Summary & Compliance

This 1/4" x 3-3/4" tapping screw adheres to standard inch measurements with precise dimensional tolerances, including a 5/16" head width and Class 2A thread fit for consistent performance. Manufactured from high-strength steel with a blue corrosion-resistant coating, it meets general industry specifications for mechanical fasteners. The product is designed for use with a 3/16" drill bit and complies with common safety and environmental regulations, including RoHS and REACH, ensuring suitability for professional and industrial applications.